Question

If the stoichiometric ratio of your reaction were 1:1, what volumes of hypochlorite and your unknown would you use to get the higest temperature possible? What if it was 1:3? 1:4? (Hint: Remember the total volume will be 10 mL)

Answer 1

If it was 1:3, the unknown will be 7.5ml and if it was 1:4, the unknown will be 8ml. The explanation is shown below:

Step-by-step explanation:

Stoichiometric ratio of hypochlorite and unknown

Ratio 1:1 in 10ml

Hypochlorite =
`(1)/(2)` mole fraction = 0.5

= 0.5ml x 10ml = 5ml

Unknown = 5ml (i.e. 10ml [total volume given] - the answer of the hypochlorite)

Ratio 1:3

Hypochorite =
`(1)/(4)` mole fraction x 10ml

= 0.25 x 10ml = 2.5ml

Unknown = 10ml - 2.5ml = 7.5ml

Ratio 1:4

Hypochlorite =
`(1)/(5)` mole fraction x 10ml

= 0.2 x 10ml = 2ml

Unknown = 10ml - 2ml = 8ml.